JPS6035746B2 - cassette tape recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for stopping a motor during a predetermined ejection stroke in a cassette tape recorder, particularly one in which a cassette is ejected by motor power.

SUMMARY OF THE INVENTION An object of the present invention is to provide a device that stops the motor when the cassette reaches a predetermined ejection stroke when the cassette is ejected by the power of the motor.

That is, a first switch that is closed when a cassette is attached, a second switch that is controlled by a rotating cam body that controls ejection of the cassette and is parallel to the first switch, and the first and second switches. a motor configured to rotate when either or both of the above are closed;
When the cassette is ejected, the rotational force of the motor is transmitted to the rotating cam body by an operation for ejecting the cassette from the outside, and the cassette is raised by the rotation of the rotating cam body. Continue closing the switch 2,
When the cassette reaches a predetermined ejection position, the second switch is opened to stop the rotation of the motor.

Embodiments of the present invention will be described below with reference to the drawings.

1 to 9 show one embodiment of the present invention, and FIG. 10 shows another embodiment. In Figures 1 and 2, chassis 1
Motor 2 is placed in the center of the front.

In FIG. 2, the motor 2 is attached to the chassis 1 with its shaft 2a
is attached so as to extend through the chassis 1 to the lower surface side of the chassis 1, and a motor pulley 3 is fixed to the lower end of the shaft 2a. Two belts 4 and 5 are stretched around the motor pulley 3 in substantially opposite directions. One belt 4
is suspended between flywheels 7 and 8 via an intermediate pulley 6, and is configured to transmit the rotation of the motor 2 to the flywheels 7 and 8, as in a normal tape recorder. The other belt 5 is hung around a pulley 9. The pulley 9 is fixed to the lower end of a shaft 10 in FIG. 2A, which extends upwardly through a bearing 11 fixed to the chassis 1, and has a pinion gear 12 fixed to its upper end. In FIG. 2, a gear arm 14 shown in FIG. 5 is rotatably supported on a supporting shaft 13 of a chassis 1.
4 has a Gya ball 15 standing on it, and a Gya axis 15 has a large Gya 1
An idler gear 18 consisting of a gear 6 and a small gear 17 is rotatably mounted.

A spring 20 acts on the hook portion 19 of the gear arm 14 to rotate the gear arm 14 clockwise, but the movement is regulated by a stopper 21 cut and raised on the chassis, and the idler gear 18 and the pinion gear 12
It is opposite to the island at a reasonable distance. A locking arm 23 is rotatably supported on a support shaft 22 of the chassis, and although the locking arm 23 is biased clockwise by the action of a torsion spring 24 coaxially equipped with iron, the tip locking portion 25 comes into contact with the locking pawl 26 of the gear arm 14 and is prevented from moving.

The torsion spring 24 also has the function of a compression spring.
The locking arm 23 is pressed against the chassis surface to prevent it from floating up. When a force in the direction of the arrow is applied to the operating portion 27 of the gear arm 14, the gear arm 14 rotates counterclockwise, the locking pawl 26 and the locking portion 25 of the locking arm 23 engage, and the force is subsequently removed. However, the gear arm 14 remains locked even under the action of the spring 20. As the gear arm 14 rotates, the pinion gear 12 and the large gear 16 of the idler gear 18 mesh with each other, and this state is maintained. In this embodiment, a method using a solenoid will be described as a method of pressing the operating portion 27.

A bracket 28 indicated by a dashed line in FIG. The pin 31 is passed through the hole 32 in FIG. 5 of the operating portion 27. Therefore, by energizing the solenoid 29 and attracting the plunger 30, the gear arm 14 can be rotated counterclockwise. The small gear 17 of the idler gear 18 is a cam gear 3 rotatably mounted on the support shaft 13.
The small gear 17 and the cam gear 33 form a planetary gear device.

The cam gear 33 is formed of a molded product, and as shown in FIG. 7, a helical cam 35 is formed on the bottom surface of its outer periphery. To the cam 35, as shown in FIG. 8, an arm 38 is attached to the side wall 36 of the chassis 1 so as to be able to swing around a rattan 37, and a roller 39 is rotatably attached to one end of the arm 38. This roller 39 faces the cam 35 of the cam gear 33, and is configured to perform rocking motion in relation to the rotation of the cam gear 33 by coming into contact with the cam 35. . Also, a roller 40 is similarly rotatably supported at the end of the arm 38, and is arranged so as to fit between a pair of protrusions 42 and 43 formed on the side surface of a cassette holder 41 shown in FIG. 9, which will be described later. , and is adapted to abut against a roller receiving portion 45 formed on the lower surface of the cassette arm 44. Furthermore, arm 3 in Figure 8
A pin 46 stands up near the roller 39 of 8, and is configured to engage with an engaging portion 47' formed on a lock arm 47, which will be described later. This lock arm 47 is rotatably supported at its lower end by a pin 130' that stands on the chassis 1, and is biased clockwise by a spring 47''. Both sides are bent downward, and holes 48, 49 are provided therein, and the holes 48, 49 are connected to the support shaft 50 and the bracket 28, which are erected on the side wall 36 of the chassis 1 shown in FIGS. 2 and 3. The cassette arm 44 is iron-coupled with a support shaft 51 that stands on a shield, and the cassette arm 44 can swing up and down using this iron-coupling portion as a fulcrum.

A pair of support shafts 52 and 53 are provided at the other end of the cassette arm 44, that is, on the right side in FIG.
It is configured to support holes 54 and 55 formed approximately in the center of the holder. The cassette holder 41 is a member that guides or holds the cassette during installation and ejection, and after the cassette is held at the playing position, the second
Through holes 60, 61 and 62 are formed on the right side surface so that the magnetic head 57 and the pinch rollers 58 and 59 shown in the figure can enter the cassette and perform normal PLAY operations.

The cassette holder 41 is connected to the support shaft 52 of the cassette arm 44,
If the cassette is only supported by the cassette 53, it will swing around using this as a fulcrum, making the cassette's posture unstable from the time the cassette is inserted to the time it descends to the playing position. There is a possibility that the capstans 63, 63' and the IJ-ru bases 64, 64', cassette guides 65, 66, etc., which should be inserted into the through holes, may not be inserted smoothly. By the engagement of the roller 40 of 38 with the pair of protrusions 42 and 43 in FIG.
Control is performed to maintain the posture of No. 1 in a nearly horizontal state.
An arm 67 extending downward is attached to one end of this cassette arm 44.
is formed and reaches the lower part of the chassis through a hole in the chassis, and a spring 70 is stretched between the hook portion 68 at the tip and the hook portion 69 of the bracket 28 shown in FIG.

Therefore, since the cassette arm 44 is receiving a clockwise biasing force, when the engagement between the lock arm 47 and the pin 46 of the arm 38 is released, the roller 39 of the arm 38 is raised by the roller receiver 45. , is constructed so as to be able to fit on the cam 35 of the cam gear 33. As shown in FIG. 8, a first switch 71 is attached to the lower side of the shaft 1, and is arranged so as to come into contact with a collar 72 coaxially fixed to the roller 40 of the arm 38, so that the cassette is in the playing state. O except when in the second position in
In the FF state, when the cassette is lowered and held at the second position, the collar 72 of the arm 38 presses the pressure receiving part 73 of the switch 71 to turn it on.

That is, this first switch 71 is for detecting that the cassette is installed in the 22nd position and for rotating the motor 2. As shown in FIGS. 6, 7, and 3, an arcuate projection 74 is formed on the upper surface of the cam gear 33 over approximately half the circumference, and a cylindrical projection 75 projects from one end thereof.

On the other hand, as shown in FIG. 3, the eject arm for ejecting the cassette is attached to a support 77 mounted on the chassis 1, and is biased clockwise by a spring 78 wound around the support 77. The arcuate protrusion 75 of the cam gear 33 is inserted into the cam hole 79, and the ejecting speed of the exact arm 76 is controlled according to the rotation angle of the cam gear 33 when ejecting the cassette. 4 and 3, a switch plate 80 is placed above the bracket 28. As shown in FIGS.

The right protrusion 80a of the switch plate 80 is connected to the bracket 28.
It fits into the hole 28a provided on the top, and the left side is the screw 81 shown in Figure 3.
It is fixed at . A switch arm 83 and a connecting arm 84 are rotatably mounted on a support shaft 82 that stands on the switch plate 80, and the connecting arm 84 is formed with an engaging piece 85 that hangs downward. This engagement piece 85 faces a protrusion 86 formed on the eject arm 76, and is rotatable clockwise when pressed by the protrusion 86. The tip of the connecting arm 84 is located at the side of the chassis.
It is inserted into an elongated through hole 87 provided in the shaped portion, and is further configured to be held between forked protrusions 88 and 89 formed at the tip of the lock arm 47. Since the forked protrusions 88 and 89 at the tip of the lock arm 47 are also inserted into the through hole 87 on the side of the chassis, the connection arm 84 and the lock arm 47 can operate reliably with little play, and the connection between the two is ensured. Prevents it from coming off. Therefore, this series of link mechanisms ensures that when the cassette is inserted, the eject arm 76 rotates and the lock arm 47 is unlocked. switch board 8
A second switch 90 is further fixed to 1 with a screw, and one arm 9 of a switch arm 83 extending in an L-shape
1, the switch 90 is turned on.

A spring 92 is stretched between the switch arm 83 and the switch plate 81, and urges the switch arm 83 in a counterclockwise direction. The other arm 93 of the switch arm 83 is arranged so as to come into contact with the cylindrical projection 75 of the cam gear 33, and the cylindrical projection 75 presses the arm 93 against the action of the spring 92, causing it to rotate clockwise. When the arm 91 is in the OFF position, the arm 91 moves away from the switch 90 and becomes OFF. However, when the cam gear 33 rotates and the cylindrical projection 75 moves away from the arm 93, the force of the spring 92 causes the switch arm 83 to move counterclockwise. The switch 90 is turned to the ON state by pressing the switch 90. This second switch 90 and the first switch 71 shown in FIG. 8 are connected in parallel, and if either switch is in the ON state, the motor 2 continues to rotate. and when ejecting the cassette, the first switch 71 is turned OFF.
The cam gear 33 controls to turn on the second switch 90 to continue the rotation of the motor 2 before the cassette is discharged, and to turn off the second switch 90 when the ejection of the cassette is completed. In FIG. 3, there is a protruding contact portion 9 on the cassette arm 44 side of the eject arm 76.
4 is formed, and the corresponding saddle portion 94 is such that when a cassette is inserted into the cassette holder 41, when pushed by the cassette, the eject arm 76 rotates counterclockwise and retreats behind the cassette arm 44, and the cassette is removed. When the arm 44 and the cassette holder 41 are moved to the second playing position, they are pressed backward by a pressing portion 95 formed on the cassette arm 44, and the tip end 96 of the eject arm 76 releases the cassette. 56, the predetermined relationship between the cassette and the main body of the device will not be disturbed.

That is, when a part of the cassette is pressed, the reel stand 64,
It is possible to prevent problems such as misalignment of the positional relationship between the magnetic head 64' and the hub of the cassette, or a change in the amount of advance of the magnetic head 57 or the way it hits the pad. As shown in FIG. 6 and FIG.
7 is formed, and this ketobashi part 97 is formed with a large gear 1 of the idler gear 18 when the cam gear 33 rotates once and the cassette is completely discharged in the process of discharging the cassette.
By kicking the arm 98 extending to one side of the locking arm 23, the engagement between the gear arm 14 and the locking arm 23 is released. By returning until it hits the stopper 21, the transmission of rotation from the pinion gear 12 to the cam gear 33 is interrupted, and ejection is completed.

When the rotation of this cam gear 33 is interrupted, the cam gear 33
Looking at the relationship between the inclined position of the cam 35 in FIG. 8 and the roller 39 of the arm 38 in FIG. The steep reverse cam portion 99 and the roller 39 are held in a state facing each other, and when the cassette is inserted in this state,
When the lock arm 47 is unlocked, the spring 7
Although the cassette arm 44 starts to fall rapidly due to the zero force, the roller 39 abuts against the inclined surface of the reverse cam portion 99, so that the cam gear 33 is rotated.

The meshing between the cam gear 33 and the idler gear 18 shown in FIG. 6 is such that the cam gear is decelerated when viewed from the idler gear side, but on the other hand, when viewed from the cam gear side, the idler gear is accelerated. Even if there is a slight resistance on the side, it becomes a large load torque on the cam gear.

Utilizing the relationship between the two, grease is applied between the idler gear 18 and the gear shaft 15 to provide viscous resistance.
Even if the roller 39 rises rapidly and attempts to rotate the cam gear 33, a large load torque is generated, so it acts as a damper and its rising speed is greatly reduced. Therefore, the cassette arm 44, the cassette holder 41, which is riding on one roller 40' of the arm 38, and the entire cassette descend from the first position (cassette ejection and insertion position) to the second position not suddenly but quietly. carried out,
Since no loud impact noise is generated, there is no need to stimulate the nerves of the user. 0 Next, to explain the operation of the above configuration, the state when the cassette is ejected will be explained about each related part.
is locked to the lock arm 47, so the four rollers on the opposite side of the shaft 37 resist the force of the spring 70 of the cassette arm 44 and move the cassette arm 44 and cassette holder 41r to the ejectable position (first position) and hold it.

Therefore, the first switch 71 is naturally in the OFF state. The posture of the eject arm 76 is regulated by the arcuate protrusion 74 of the cam gear 33 despite the biasing force of the spring 708, and when ejecting, it is in the most clockwise rotated state, and its tip is inside the cassette holder. It's going deep. The switch arm 83 is the arcuate projection 7 of the cam gear 33.
4, the second switch 90 is in the OFF state, so both the first and second switches 71 and 90 are in the OFF state.
Motor 2 is stopped because it is in the FF state. Cam gear 3
Since the locking arm 23 is unlocked by the locking lever 97 of No. 3, the locking arm 23 is rotated clockwise by the action of the spring 20 of the gear arm 14 and comes into contact with the stopper 21 of the chassis 2. Therefore, the engagement between the pinion gear 12 and the hydraulic gear 18 is released. The connecting arm 84 coupled to the lock arm 74 is in a state of movement in the counterclockwise direction because the lock arm 47 is in the locked state and the eject arm 76 is in the clockwise rotation state. In this state, remove the cassette from the cassette holder 4.
When the cassette is inserted while being guided by the upper and lower side walls of the cassette 1, the tip of the eject arm 76 is pressed by the tip of the cassette, and the eject arm 76 can be rotated counterclockwise. When the cassette is roughly pressed, the protrusion 86 of the eject arm 76 comes into contact with the engagement piece 85 of the connection arm 84, and by rotating this clockwise, the lock arm 47 and arm 3
The lock arm 4 is disengaged from the pin 46 of 8 in the direction of release.
When the cassette for moving the cassette 7 is further pushed in and reaches the predetermined amount of advance to be installed in the second position, the engagement between the lock arm 47 and the pin 46 of the arm 38 is released, and the arm 38 is moved by the spring 70. The force and the weight of the cassette arm 44, cassette holder 41, and cassette 56 cause the cassette arm 44 to rotate counterclockwise.
, the cassette holder 41 and the cassette are lowered together and installed in the second position which is to be the playing position.

At this time, the first switch 71 is operated by a collar 72 coaxially fixed to the roller 40 of the arm 38 and changes from OFF to ON', so that the motor 2 starts rotating. The eject arm 76 is separated from the front surface of the cassette by the cassette arm 44. Therefore, the cassette is put on standby, and normal operations such as PLAY, FF, REW, etc. are performed thereafter, but these are not directly related to the present invention and will not be explained here. The pinion gear 12 is rotating via the motor 2, belt 5, and pulley 9.

On the other hand, the cam gear is forcibly rotated by the upward movement of the roller 39 of the arm 38, and the roller 39 reaches the highest position (the lowest point when viewed from the cam side) and stops moving. As explained above, resistance is generated in the gear portion at this time, and the damper device has an appropriate effect. With the roller 39 falling into the valley 100 of the cam 35 of the cam gear 33, the switch arm 83 is pressed by the cylindrical projection 75, and therefore the second switch 90 is maintained in the OFF state. Normal PLAY, FF
, REW, etc., when the performance or operation such as REW is finished and it becomes necessary to eject the ejector, a switch is provided that is linked to the eject button (not shown in the figure), and when the eject button is pressed and the switch is turned on, , the solenoid 29 rapidly suctions the plunger 30.

The gear arm 14, which is connected to the plunger 30 by a pin 31, rotates counterclockwise against the spring 201. Therefore, the drag gear 18 meshes with the rotating pinion gear 12, and this rotation is transmitted at a reduced speed, and further reduced and transmitted to the cam gear. Since the gear arm 14 is held in a locked state by the locking arm 23 in this attracted position, the rotation of the pinion gear 12 is continuously transmitted to the cam gear 33 even if the solenoid 29 is de-energized.

When the cam gear 33 starts rotating, the pressure on the switch arm 83 is released, and the second switch 90 is moved by the spring 92.
Changes to the ON state by the force of. The roller 39 in contact with the oblique cam 35 starts to descend following the increase in the lift of the cam 35, and therefore the cassette arm 44, cassette holder 41 and cassette 56 start to rise, causing the collar 72 of the arm 38 to rise. The pressing force is released and the first switch 71 is turned off. At this time, since the second switch 90 is already in the ON state, the motor continues to rotate. At this time, the saddle portion 94 of the eject arm 76 is urged in the direction of contacting the cassette by the force of the spring 78 because the pressure of the pressing portion 95 formed on the cassette arm 44 is released. The cam hole 79 of the eject arm 76 is controlled by the arcuate protrusion 74 to restrict rotation, so even if the cassette arm 44 is no longer pressed, it does not come into contact with the cassette, so the cassette ascends smoothly. .

As the cam gear 33 rotates further, the cassette finally rises to the highest ejectable position (first position).

At this point, the arc-shaped protrusion 74 that was regulating the rotation of the eject arm 76 is discontinued, so the eject arm 76 is moved between the cam hole 79 surface and the terminal end 1 of the arc-shaped protrusion 74.
01 begins to rotate while making contact with the cassette, and ejection of the cassette begins. On the other hand, the lock arm 47 is now the arm 38.
the cassette arm 44 supported by the other roller 40 of the arm 38 and the cassette holder 4 held by the cassette arm 44.
1 is held at the first position where the cassette can be inserted and ejected.

Even though the eject arm 76 is urged to rapidly eject the cassette by the spring 78, the ejection speed is controlled by the arcuate protrusion 74 of the cam gear 33 and follows the rotation of the cam gear 33, so that the cassette is ejected. The movement is performed slowly and smoothly, and there is no problem of the object jumping out with force.

Before the ejecting stroke of the cassette is completed, the kick part 97 of the cam gear 33 kicks the arm 98 of the locking arm 23 to release the locked state, so the gear arm 14, which has pushed the idler gear 18 by the biasing force of the spring 20, moves clockwise. , the pinion gear 12 and the idler gear 18 are disengaged, and the rotation transmission to the cam gear 33 is completed.

Almost at the same time, the cylindrical projection 75 of the cam gear 33 rotates, contacts the switch arm 83 and presses it, and the second
The motor 2 is stopped by turning off the switch 90. The eject arm 76 is supported by both ends of the arcuate protrusion 74 of the cam gear 33 and the cam hole 79 of the eject arm 76, so that further rotation is restricted. This also applies to the rotation of the cam gear 33 as well as the eject arm 76.
This prevents the stop position from changing due to vibration etc. when the cassette is not inserted. In the above embodiments, an example in which the ejection operation is performed by an electrical method using a switch and a solenoid has been described. Next, a mechanical method will be described with reference to FIG.

However, since the parts other than the means for starting the ejecting operation are the same, duplication of explanation will be avoided. In addition, in the case of this embodiment, since the PLAY state is entered by button operation, the motor does not rotate even if the power set is simply attached to the playing position, but the motor rotates when each operating lever is operated. It has become. In Fig. 10, ejection push button 1
02 has a fixed ejection operation lever 103, and a switching lever 104 that moves in conjunction with the operation lever 103 and engages with the operation lever 103 only when in the STOP state is aligned with a support shaft 105 on the chassis 1. and is subjected to an urging force by a spring 106.

In this case, a force to rotate counterclockwise around the support shaft 105 and a force to move in the direction of the push button 102 are generated, and the movement is caused by It is regulated by 105 sides of Shido. The operating lever 103 is attached to the stepped portion 108 formed on the switching lever 104.
The cut-and-raise abutting twill portion 109 is arranged so that it can be abutted, and is configured to move in the direction in which the push button 102 is pressed when pressed. The switching lever 104 has arms 110 and 111 that are open in the form of a fork, and the tip 1 of one of the arms 111 is open.
12 is arranged facing the leaf spring 113. This leaf spring 113 is fixed to an operating arm 115 that is rotatable around a support shaft 114 provided on the chassis, and is installed in the gear arm 14 in the outermost hole 116 formed at the tip of the operating arm 115. The gear arm 14 is configured so that clockwise rotation of the operating arm 115 can be converted into counterclockwise rotation about the support shaft 13 of the chassis 1. The tip of the arm 118 of the gear arm 14 extending perpendicularly to the gear shaft 15 of the idler gear 18 is connected to the pressure receiving part 1 of the switch 119 held on the chassis 1.
20, and is configured such that a switch 119 is turned on when the gear arm 14 rotates counterclockwise.

In this case, it is considered that the switch 119 is operated before the idler gear 18 engages with the pinion gear 12 to rotate the pinion gear 12 and then assist the idler gear 18. In other words, this switch 119 is provided to rotate the motor 2 during ejection, and if the switch 119 is not turned on at least before the tops of the teeth of the gears come into contact, the gears will Sometimes they don't mesh, which makes me feel unwell. With the configuration as described above, the operation will be described next. When the ejection button 102 is manually pressed to eject a cassette from the STOP state, the cut-sliding lever 104 is moved in the pressing direction via the operating lever 103. The tip 112 of the arm 111 presses the leaf spring 113 to rotate the entire operating arm 115 clockwise.

Therefore, the gear arm 14 is pushed counterclockwise around the support shaft 13, operating the switch 119 and causing the motor 2 to rotate. The pinion gear 12 and the idler gear 18 mesh with each other, and rotation is transmitted to the cam gear 33, as in the previous embodiment. Similarly, the gear arm 14 is locked by the locking arm 23. In the above series of operations, the leaf spring 113 is used because the stroke of the switching arm is greater than the stroke of the gear arm side in order to ensure that the gears engage with each other, so the difference in stroke is This is for absorption. In this embodiment, a motor is used as the power source, but it is of course possible to use a solenoid, for example, and any method that does not involve human hands, fingers, etc. is included in the present invention. Needless to say.

As explained in the above embodiments, according to the present invention, even if the first switch is turned OFF during cassette ejection, the second switch is turned OFF until the rotating cam body reaches a predetermined rotational position. The motor rotates reliably and when the cassette reaches the predetermined ejection position, the second switch is turned off by the rotating cam body, so the motor can be reliably stopped after ejecting the cassette, making it industrially effective. It is something that has.

[Brief explanation of drawings]

FIG. 1 is a perspective view of one embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG.
Figure 3 is an enlarged plan view of the front left side of Figure 2, Figure 4 is a right side view of Figure 3, Figure 5 is from Figures 3 and 4. FIG. 6 is a plan view showing the portion placed below the bracket 28 with the bracket 28 removed, FIG. 6 is a perspective view seen from direction B in FIG. 5, FIG. 7 is an enlarged perspective view of the cam gear, and FIG. 2 is a left side view, FIG. 9 is a perspective view of the cassette holder 41 and the cassette arm 44, and FIG.
The figure is a partially omitted plan view of another embodiment of the present invention. 33...Cam gear, 41...Cassette holder, 44...
...Cassette arm, 71...First switch, 76...
Eject arm, 90...second switch. Younger brother's figure 3 figure 2 figure 2 younger brother'o figure

Claims (1)

[Claims] 1. A cassette holder that holds a cassette and is movable up and down between a loading/unloading position (first position) and a recording/playback position (second position); an elevating member that moves up and down between positions; an ejection-related member that holds the elevating member at the first position and is energized to enable ejection of the cassette; and a cam portion that controls the elevating and lowering of the elevating member. a second switch controlled by the cam portion of the rotary cam body; and a circuit configured in parallel with the second switch and configured to detect the device of the cassette. and a first switch that drives an electric motor, and when a cassette is ejected from a cassette-mounted state, the elevating member raises the cassette holder using the cam portion of the rotating cam body, and the first switch is pressed. A cassette tape recorder characterized in that, before the second switch is released, the second switch is operated by the rotation of the rotary cam body to continue the rotation of the electric motor until the cassette is completely ejected.